Ratchet mechanism.



AI FALKENAU. RATCHET IVIECHNISIVIl APPLICATION FILED MAR. I6. 1'915.

' Patented Aug, 17, 1915.

Figvthe piane o section being wat i" i 'inlog ARTHUR FALKENAU, on new Yoan, v i nnwfzons, n. einen To all whom t may concern.'

Be it known that ARTHUR FALKEN'AU, a citizen of the United States, residing in the city of NeW York, borough or" Manhattaxnr *in* the county and State of New York, have invented" a ycertain new and usei'ulslr'm pror'ement 1n Ratchet Mechanism, of which the .following is a specification.

-The inventionl relates `to ratchet and pa'wlj devices, andthe object of the invention is 'cally and thus avoid danger of accident tov the hand of the operator. A

'The invention consists in cer iin novel features and details of construction andarran'geinent by which the 'ahove fl attained, to hereinafter descirv claimed. i 4- In' :certain classes of machinery, notably in hoistingapparatus designed for thefremov-al of ashes and the 'like 'frointhe cellars of residences, apartment' l'io'osese .and hotels, the' noise due to the :fiction of the 'pawl is very objectionable; this invention is intended especially for such conditions of service, and'will 'oe thus shown and described.'

The accompanying drawings term a part of this specification and show the invention as appiied to a hoisting apparetns similar to that set forth in "il S. Letters Patent to IJohn A;'-Keariiey, dated May 19,19%, Nd 1,097,233. Y

Figure l is a plan View of the hoisting' head equipped with the improved sileneer.

FigQ is 'a Vertical section' through a. portion of the head7 and partij! 1n elevation Fig. 3 a plan view ot' the siiencer aime. is a corresponding vertical sec dicated by the is horizontal `line 4--4 in, Fig. section of the saine taken in Fig. 4.

Similar letters of reference indicate the same partsv in ail the gures,

specification er' mi; seems'.

almacenan massima 1e, reis lel 'With the shaft Bl of .the shaft C, as the; coneiCned notfhe the vertica lugs'-3 A3 'on arranged to carse the Casi n isole(mms-Oftmissing:idhavij horizontally projecting arios A1 A? in which is'niout'ed a shaft B carri/'inge described in relation tothisiiiirent'i'on nY the. turning ioifenen't cease "i r e silencer comprises a haring 'a semieircnlar 'yoke'l adapted to :receive a: `"corres et the opposite end of the easing; is a. nger B3 extending parai- 'l i eme Y'Wllbevimderstood to operate in theniinner and for the purposes set'fo'r Lett/:ers 'Patent to which reiierena'zel s ni` de hoi?y The shaft C fis' 'turned if-a fera not* shown,'` applied upon th' A ov'erhiing' endCI, and the pi'n'ionC- lsoseri/"es' as' ratchet Wheel. v1'70 loadf lei with th'e'shait and lying below the pawl i? and between elet-ter and the 'frame-arm el or other tively iixed s top.-

Nitliin the casing is a. cylindrical plug M preferahly at' Wood, iooseiy ineiosed and fgrooved or hoilor-fed transversely at one end to rnateh the adjacent cylindrical surface of the shaft C, and is heldin strong friov tional Contact therewith by the. expansive .foiee of an inciosed helical spring N' ahutting "it one end against the plug and at the other against 'the closed head of the easing. The friction 'thus' induced is sufficient to to revolve with the shaft in lre fiineih and when restrained to permit the' shaft to turn in rubbing Contact with the ping.

when the shaft @is turned inthe direction to revoiif'e the windingdrrnn and raise the loadE the frietion between the' plug and causes the to turn with the iatloo i ter and forces the upper edge of the finger D3 into contact with the adjacentr under faceof the pawl'F, thus lifting the pirwl 'clear of theteeth of the pinion, the pawl remaining in this condition.. held` by the finger during .the continuation of the hoist- ,ing movement, with the shaft C revolving in i-dle frictional contact with the plug M.

The extent to wliich'the pawl may be thus lifted is determined by the contact of a shoulder F1 onthe pawl with a surface A* on the frame between the lugs A3 A3, or

-other suitable limiting means which may if tion .the casing again moves therewith and the ,finger D3 is correspondingly moved downwardly, permitting the pawl to descend by gravity until engaged with a tooth, or until the finger is arrested lby the contact of its lower edge with thestop formed by the upper surface of the arm A2. VIt will 'A be noted that this 'rengagement of the pawl and pinion is immediate for the reason that the vare of revolution of the shaft in thus Alowering the pawl is exceedingly small.l less than the arc 'between two teeth of the pinion whenithe parts are proportioned as shown in the drawings. y

Other forms of friction grasping means maybe employed, and any suitable fixed stop for the finger may be substituted for the arm A2 as the location of the pawl and `pinion may require in various `adaptations of the invention, and other modifications may be made as found necessary or desirable in conditioning the 'invention for service with various pawl and ratchet devices.

1. A shaft, a toot-lied wheel mounted thereon to turn therewith,` a pawl adapted to engage such teeth, a casing loosely mounted on saidshaft and engaged frictionally therewith, a finger on said casing, a stop for limiting the movement of said finger in one direction, said finger located between said stop and pawl and adapted to contact with and raise said pawl clear of said wheel when said wheel and shaft are rotated in one direction, and when rotated in'the opposite direction to move toward said stop and permit rengagement of said pawland wheel. A

Q. A shaft, a toothed wheel mounted thereon to turn therewith, a pawl adapted to engage such teeth, a hollow casing looselyr connected to said shaft, a friction plug in said casing, a spring in the latter forcing said plug into frictional contact with said shaft, a finger on said casing, extending between said pawl and a fixed stop, said stop serving to limit the movement of said finger in one direction.' y

3. A shaft, a toothed wheel mounted thereon to turn therewith. a pawl adapted to engage such teeth, a hollow casing loosely connected to said shaft, a friction plug in said casing, a spring in the latter forcing said plug into frictional contact with said shaft; a finger on said casing, extending be- 'tween said p awl and a fixed stop, said stop. v serving to limit the movement of said finger in one direction, and means for limiting the disengaging movement of said pawl.

In testimony that I claim the invention above set forth I affix my signature, in presence of two witnesses.

ARTHUR FALKENAU.

'itnesses:

CHARLES R. SEARLE, C. M. FREDERICKS. 

